DOVER, Del. (AP)  A lengthy investigation by Air Force officials has concluded that the remains of astronaut and former U.S. Sen. John Glenn were not treated disrespectfully at the Dover Air Force Base mortuary prior to his burial at Arlington National Cemetery last year.

The Air Force launched a probe in May 2017 amid concerns that that inspectors who were visiting the facility had been invited to look at Glenn”s remains, which they declined to do.

The report found that Glenn”s remains were treated with dignity, but it also cited unrelated incidents involving questionable behavior by the former chief of the mortuary, William Zwicharowski.

Zwicharowski, who resigned earlier this year, told the Associated Press last year that Glenn”s remains were treated with “impeccable care,” and that the invitation to inspectors was “solely professional.”